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Title: Local Structure around In Atoms in InxGa1-xN Multi-Quantum-Wells Studied by XAFS

Abstract

Indium K-edge EXAFS measurements were carried out to study local structures around In atoms in InxGa1-xN multi-quantum-well (MQW) structures of 10 periods with In0.2Ga0.8N (2.5 nm) and In0.05Ga0.95N (7.5 nm). We found the following: (1) Debye-Waller factors for In-In and In-Ga atomic pairs in MQW are smaller than those in single QW (SQW) InxGa1-xN. (2) The differences in the interatomic distances of In-In and In-Ga between the horizontal and vertical direction are small. These results indicate that the strain in the InxGa1-xN layer is reduced in MQW in comparison to SQW. (3) In atoms are randomly distributed in both the horizontal and vertical directions of the sample.

Authors:
; ;  [1]; ;  [2];  [3];  [4];  [5]
  1. Department of Advanced Physics, Faculty of Science and Technology, Hirosaki University, Hirosaki, Aomori 036-8561, (Japan)
  2. SPring-8/JASRI, 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)
  3. Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573 (Japan)
  4. (Japan)
  5. Department of Electrical Engineering and Bioscience, Waseda University, Shinjuku, Tokyo 169-8555 (Japan)
Publication Date:
OSTI Identifier:
21054665
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 882; Journal Issue: 1; Conference: XAFS13: 13. international conference on X-ray absorption fine structure, Stanford, CA (United States), 9-14 Jul 2006; Other Information: DOI: 10.1063/1.2644572; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; COMPARATIVE EVALUATIONS; CRYSTAL STRUCTURE; DEBYE-WALLER FACTOR; FINE STRUCTURE; GALLIUM NITRIDES; INDIUM; INDIUM NITRIDES; INTERATOMIC DISTANCES; LAYERS; QUANTUM WELLS; SEMICONDUCTOR MATERIALS; STRAINS; X-RAY SPECTROSCOPY

Citation Formats

Sasaki, Shinya, Miyanaga, Takafumi, Azuhata, Takashi, Uruga, Tomoya, Tanida, Hajime, Chichibu, Shigefusa F., Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, and Sota, Takayuki. Local Structure around In Atoms in InxGa1-xN Multi-Quantum-Wells Studied by XAFS. United States: N. p., 2007. Web. doi:10.1063/1.2644572.
Sasaki, Shinya, Miyanaga, Takafumi, Azuhata, Takashi, Uruga, Tomoya, Tanida, Hajime, Chichibu, Shigefusa F., Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, & Sota, Takayuki. Local Structure around In Atoms in InxGa1-xN Multi-Quantum-Wells Studied by XAFS. United States. doi:10.1063/1.2644572.
Sasaki, Shinya, Miyanaga, Takafumi, Azuhata, Takashi, Uruga, Tomoya, Tanida, Hajime, Chichibu, Shigefusa F., Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, and Sota, Takayuki. Fri . "Local Structure around In Atoms in InxGa1-xN Multi-Quantum-Wells Studied by XAFS". United States. doi:10.1063/1.2644572.
@article{osti_21054665,
title = {Local Structure around In Atoms in InxGa1-xN Multi-Quantum-Wells Studied by XAFS},
author = {Sasaki, Shinya and Miyanaga, Takafumi and Azuhata, Takashi and Uruga, Tomoya and Tanida, Hajime and Chichibu, Shigefusa F. and Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573 and Sota, Takayuki},
abstractNote = {Indium K-edge EXAFS measurements were carried out to study local structures around In atoms in InxGa1-xN multi-quantum-well (MQW) structures of 10 periods with In0.2Ga0.8N (2.5 nm) and In0.05Ga0.95N (7.5 nm). We found the following: (1) Debye-Waller factors for In-In and In-Ga atomic pairs in MQW are smaller than those in single QW (SQW) InxGa1-xN. (2) The differences in the interatomic distances of In-In and In-Ga between the horizontal and vertical direction are small. These results indicate that the strain in the InxGa1-xN layer is reduced in MQW in comparison to SQW. (3) In atoms are randomly distributed in both the horizontal and vertical directions of the sample.},
doi = {10.1063/1.2644572},
journal = {AIP Conference Proceedings},
number = 1,
volume = 882,
place = {United States},
year = {Fri Feb 02 00:00:00 EST 2007},
month = {Fri Feb 02 00:00:00 EST 2007}
}